-13 - 8 = -21
i think it is 5
-8 - (-13) = - 8 + 13 = +5 ( minus a minus is a plus)
-5 - 13 = -18
21
-18
It is 13/72 minus 3/8 = -7/36
5 minus -8 is 13.
8 plus 1 times 12 minus 13 is equal to seven.
-5
13
13/2 − 5/8 = 47/8 or 57/8
5/9 minus 3/8 is 13/72
11/12 minus 3/8 is 13/24